Max safe boost? [Merged 10-6]

[Turbolaser]

Is it safe to do the boost contol solenoid mod on a stock 1G?

 

[95gster]

I was wondering how much boost can I safely run on my car, my following mods are.....

Big 16g,
full 2.5 inch exhaust/downpipe/test pipe,
1g Bov,
Walbro 255 fuel pump,
Cone filter,
Manual Boost Controller,
Boost/air fuel gauge

mods that are on the way to my house....

Upper intercooler piping
Dejontool tool intake

I am currently running 15-16 psi and I know that I'll need an AFC and injectors to take full advantage of my big 16g so if anyone have a set up similar to mine or anyone that knows how much boost I can safely handle I'd appreciate it....

 

[Megaman]

with the mods you have now, i wouldnt go past 15psi...

 

[szewczyd]

i have a 91 TSI and am just about to buy a boost controller, but I don't even know how much i should trun the boost up to. please look at my mod list. I always run on premium so please help me. Stock the car is runnning about 11 psi right?

 

[91gst]

Yeah the car stock is set at 11psi. With the boost controller I wouldnt run more than 16psi until you get a fuel pump. Hope this helps.

 

[Defiant]

Yup, 16.

I've heard 15 more often, but splitting hairs.

 

[FASTSPOOLINGST]

even after u do get a fuel pump, i still would not go over 15-16 psi. You have stock injectors, they will need to be upgraded along with some type of controller before going any higher in your boost. Unless you are going to be putting in race gas, then u can crank it up a bit more.

 

[Bmw6pack]

the highest i've ran is 18 and my buddy runs 20. but like everyone is saying, it is not wise to run it that high unless you have the components to back it up.

 

[Enigma_Man]

I generally don't run more than 13 psi regularly, without watching the datalogger like a hawk. Any more than that, and on a highway run, my car will start knocking after maybe 20 seconds. I basically have a stock fuel system (rewired fuel pump, that's it), and I have 2g pistons with higher compression. [EDIT]: I also have a 16G, duh where's my brain?

On race gas though, I've run 19 psi.

-Jesse

 

[92LaserRS-T]

So the stock 1G DSM's run 11psi??? Thought that they ran like 6-7 psi stock?? what do I know.. don't really know anything about these cars yet.... just got mine about 3 weeks ago and still waiting to get mods for it... Anyways... hope I get to learn alot on this board... thanks Mike

 

[FASTSPOOLINGST]

i'm pretty sure 2g's run like 8-10psi stock and you can do the free mod on the solenoid to get about an extra 2 after that. Hate to say this, but if u really want to know how much boost u can run, just keep turning your boost controller up like 1/4 -1/2 turn at a time and as it slowly increases the pressure. just go down the street doing some runs at full boost. When u hit fuel cut. Back it off a 1/4 to 1/2 turn, this will be your max boost on your current fuel system. I would not run it at that psi though. Listen to everyone in these forums. You can probably run a higher boost, but you are not going to be doing anything, but flowing hot air. Run a boost psi that gives you the most power. For some it is 13 psi, some 15 psi. depends, all cars are different man.

later bro,

Pat H

 

[stock1g4g63]

I kind of have a newbie question since some things have happened. I use to run an 18G, 550cc injectors, 255 warlbro fuel pump, all upper and lower intercooler piping, downpipe + catback, and a spearco frontmount intercooler at 18psi. However, I have since then gotten into an accident and had to make a few changes, 18g went to a 14b (since I locked up my turbo.... vacuum hose blew off in the accident) and front mount is back to sidemount. So right now, it's 14b, stock sidemount, and everything else is the same. My question is, how much boost is safe to run? I'm thinking about 14psi, does that sound good? Or could I maybe go up to 16?

 

[Spln_Hrd]

i also would like to know what i could run on a sidemount.... i plan on injectors, fuel pump and the mods i already have(16g and full exhaust)

 

[98RedGs]

I would honestly tell either of you 15psi if it was me.

 

[stock1g4g63]

good game, that's what I thought, just wanted to get a second opinion, from a fellow DSMer. If something goes wrong, then I'm not the only one that will feel stupid!

 

[awd4g63]

I'm running 16psi on a fuel pump alone (255), and I haven't had any problems with it. All logs down the track have been ok according to the datalogger.

 

[90CherryTSI]

What is the max boost that's "safe" to run through a 14b? It's a 90 TSI, 105k miles, I do think it sat for about a year or so. My 14b just blew and I'm not sure if it was related or not to the 13-14lbs I had going through it. I had a manual boost control opened up that allowed anywhere from 12-14 through it with no other mods really (that's fully opened). I'm not sure if it's related to the fact that the o2 sensor CEL light was on, I replaced that, it came back on again. Does the A/F ratio have anything to do with a turbo going bad? Was that to much boost for a 14b? My friend has his 14b ported (not sure what this does, can someone fill me in exactly?), an IC, a Greddy BOV, and he was hitting like 17-18 lbs at times. With just the turbo being ported, stock manifold, gutted cat, and stock exhaust, what's the safe level to run w/o killing it? Anything else I should check for? Like I said I'm not sure if the o2 is related or I was just trying to push a watermelon through a waterhose, any ideas would be appreciated as I don't want to blow this one on the way. Somethign else, I had it towed home, it saw for a few hours (it's really cold right now) and it started up and the vaccum was back, it revved and didn't blow any smoke (that's how I noticed it went bad, dumping white smoke like Spyhunter). When the engine is back to cold again, will the car run until it's cold again? I did notice while I tried to start it after the turbo blew that the boost needle freaks out but then after it was cold it went back to neg vaccum when it was cold like normal....thanks again for all the help guys!

 

[kpt4321]

I run 17 psi daily, 20 psi at the track on my 14b.

 

[Focusonme13]

tdo5h....is this the 13 or 14b???

 

[1990CherryTSI]

It's the 14b. So was it just a turbo gone bad? Doesn't have anything to do with the other "problems"?

 

[TimG]

What on the turbo actually blew? Intake compressor wheel, turbine wheel, seals or what?

 

[Larry L]

Simply put. TDo5H is the 14B or the 16G. I ran a 14b for a full year on just the 255lpm pump, & 3 in. exaust. It handled 16 lbs all day, and I had to have it rebuilt then converted to a 16G IMO If your O2 CEL code is on and you have no high flow fuel pump you could run the engine lean. And risk Detonation. But, I don't see how this would blow the turbo.. In my experience No oil, to much oil, or no coolant was the villan.

No oil-You cook it!

Too much oil- And the gravity drain on the turbo wont drain peoperly and cause damage.

No coolant- Overheating.

IMO I don't believe that a lean condition caused your turbo to retire.

Hope this helps

 

[markgholland]

When was the last time you changed your oil? You could have choked it... I know that it sounds stupid, but it's possible. What kind of oil are you running? Why don't you throw a 255lph in it? You'll have to do it eventually.

 

[90CherryTSI]

less than 500 miles ago, castrol 20w50. I gotta take it off to see what actually went bad....dunno yet as I'm waiting til Sunday to do it but I'll let you guys know so I know what to try to change/fix so this one doesn't go also....

 

[Gooberlog]

Under normal operation i run 18psi on my 14b w/ 94octane and 20+w/ 110 leaded.

 

[Talon__22]

how much boost can i run safely with stock fuel pump/no re-wire??